Pneumatic transfer systems are employed in many industries to move powders and devices. Pneumatic devices are also used where electric motors cannot be used for safety reasons, such as deep in a mine where explosive dust or gases may be present.
Examples of pneumatic tools[change | edit source]
- Pneumatic drill (jackhammer) used by road workers
- Pneumatic nailgun
- Pneumatic switches
- Pneumatic actuators
- Air compressors
- Vacuum pumps
- Barostat systems used in Neurogastroenterology and for researching
- Cable Jetting - a way to install cables in ducts
- Pneumatic mail systems
- Air brakes on buses, trains, and trucks
Comparison to Hydraulics[change | edit source]
Advantages of pneumatics[change | edit source]
- The working fluid is very light in weight so supply hoses are not heavy.
- Because the working fluid is (mostly) just air, there is usually no need for a return line for the working fluid and leaks of the working fluid tend not to be messy.
- Because air is compressable, the equipment is less likely to be damaged by shock. The air in pneumatics absorbs excessive force, whereas the fluid of hydraulics directly transfers force.
Advantages of hydraulics[change | edit source]
- Higher energy density owing to the much higher working pressures usually employed.
- The hydraulic working fluid is basically incompressible, leading to a minimum of spring action. When hydraulic fluid flow is stopped, the slightest motion of the load releases the pressure on the load; there is no need to "bleed off" pressurised air to release the pressure on the load...
References[change | edit source]
Other websites[change | edit source]
- www.pneumatics.be - didactic website - for students - how pneumatics works
- U.S. Department of Energy - Improving Compressed Air System Performance
- Fluid Power Educational Foundation - Advancing and Supporting Hydraulic & Pneumatic Education
- Pneumatics Glossary - Glossary of Pneumatic Terms
- E-Tech - The online application to select, size, and build pneumatic automation products